A year ago my 1990 YJ had the carb rebuilt because of idling issues. It seemed to work fine until the weather has started to cool off (below 70 in tucson). When its cold the Jeep seems to randomly idle very low or not at all. Thankfully I have mastered using the break while milking the throttle to stop without killing it. I have no automotive experience so any help would be great. Also, when its cold my sound system outputs engine noise (not sure if this has any relation to the issue).